In-plane electro-optic anisotropy of (1−x)Pb(Mg1/3Nb2/3)O3–xPbTiO3 thin films grown on (100)-cut LaAlO3

摘要: Strong electro-optical (EO) anisotropy has been measured in (1−x)Pb(Mg1/3Nb2/3)O3–xPbTiO3 [(1−x)PMN–xPT] single crystalline films epitaxially grown on (100)-cut LaAlO3 substrate, through using an improved dynamic alternating-current ellipsometric null EO detection technique with high accuracy. Large quadratic coefficients, which can be as large 1.38×10−16 (m/V)2 0.67PMN–0.33PT film, were obtained all the used compositions when electric field was applied along {110} directions. The strong explained according to structural relationship between ferroelectric polarization, input light and field.